摘要：Description The cows play the child's game of hopscotch in a non-traditional way. Instead of a linear set of numbered boxes into which to hop, the cow 阅读全文

摘要：Description FJ and his cows enjoy playing a mental game. They write down the numbers from 1 to N (1 <= N <= 10) in a certain order and then sum adjace 阅读全文

摘要：Description Given a number of distinct decimal digits, you can form one integer by choosing a non-empty subset of these digits and writing them in som 阅读全文